Progress in breeding for resistance to fusarium head blight in barley

Evaluation of Canadian barley breeding lines for Fusarium head blight resistance

“…In the present study, correlation coefficients of 0.63 and 0.55 were found between FHB and DON in 2013 and 2014, respectively, which were close to the values reported by Steffenson (1998) (Clear et al 1996;Tekauz et al 2000), in accordance with our result with correlation coefficients of 0.37 and 0.43 in the 2 yr. The moderate correlations of FHB/DON and FDK/ DON justified the screening on FHB and FDK for the identification of varieties with low DON content, but the transformed determination coefficients were generally low (r 2 ranging from 0.19 to 0.40) and there were always outliers, as shown before (Tekauz et al 2000;Legge et al 2004) and in our study (Table S1), indicating the importance of performing DON assay for the promising lines with low FHB and FDK.…”

“…According to Clear et al (1997), over 50% of DON initially present on barley grain could be removed during the dehulling process, which was in agreement with the results of Zhou et al (1991) and Legzdina and Buerstmayr (2004), in which hulless varieties showed lower DON content than hulled lines. However, Chen et al (1991) found the opposite trend in a collection of 4163 Chinese barley varieties, and Legge et al (2004) also noticed the existence of Canadian hulless barley lines with very high DON content. Thus, it seems that the tolerance to DON is highly dependent on genetic background.…”

“…On pourrait y recourir dans les programmes d'hybridation comme source de re´sistance ou les homologuer en tant que nouveaux cultivars, si leurs parame`tres ge´ne´raux respectent les normes commerciales. (Clear and Patrick 1990;Clear et al 1996;Tekauz et al 2000;Legge et al 2004;Choo 2006). The increased prevalence of FHB in the 1990s could be ascribed to possible changes in the Fusarium pathogen population, alterations in rainfall patterns, adoption of conservation agriculture practices, and the widespread cultivation of susceptible crop varieties (Tekauz et al 2000).…”

“…1 (also known as Gobernadora and Zhenmai 1) from the ICARDA/CIMMYT program in Mexico and Svanhals from Sweden. The weaknesses of these sources were undesirable agronomic attributes, susceptibility to other diseases, and poor grain quality, highlighting the necessity of identification and utilization of new resistance sources from the locally adaptive derivatives of those exotic resistance sources (Legge et al 2004).…”

Newdale barley

“…When Newdale was evaluated in the Western Cooperative Two-row Barley Registration Test, fusarium head blight (FHB) caused by Fusarium graminearum Schwabe was emerging as a major concern in western Canada, but no data were collected on reaction to this pathogen. While Newdale was undergoing market development and commercialization, data on FHB reactions and deoxynivalenol (DON) concentration in the grain were collected from 2000 to 2006 in the AAFC Brandon FHB nursery as described by Legge et al (2004).…”